package com.lfw.eduservice.controller;


// import com.baomidou.mybatisplus.extension.api.R;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.lfw.commonutils.R;
import com.lfw.eduservice.entity.EduTeacher;
import com.lfw.eduservice.entity.vo.TeacherQuery;
import com.lfw.eduservice.mapper.EduTeacherMapper;
import com.lfw.eduservice.service.EduTeacherService;
import com.lfw.servicebase.exceptionhandler.GuliException;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;

import java.util.List;

/**
 * <p>
 * 讲师 前端控制器
 * </p>
 *
 * @author lfw
 * @since 2022-03-07
 */
@Api(description = "讲师管理")
@RestController
@RequestMapping("/eduservice/teacher")
// @CrossOrigin
public class EduTeacherController {
    //访问地址： http://localhost:8001/eduservice/teacher/findAll
    //把service注入
    @Autowired
    private EduTeacherService teacherService;

    //1 查询讲师表所有数据
    //rest风格
    @ApiOperation(value = "所有讲师列表")
    @GetMapping("findAll")
    public R findAllTeacher() {
        //调用service方法实现查询所有的操作
        return R.ok().data("items", teacherService.list(null));
    }

    //2 讲师逻辑删除方法  需要改进一下，怎么删除都是返回true
    @ApiOperation(value = "逻辑删除讲师")
    @DeleteMapping("{id}")
    public R removeTeacher(@ApiParam(name = "id", value = "讲师id", required = true)
                                 @PathVariable String id) {
        boolean flag = teacherService.removeById(id);
        if (flag) return R.ok();
        else return R.error();
    }

    //3 分页查询讲师方法
    //current 当前页
    //limit 每页记录数
    @ApiOperation(value = "分页查询讲师方法")
    @GetMapping("pageTeacher/{current}/{limit}")
    public R pageListTeacher(@PathVariable Long current,
                             @PathVariable Long limit) {

        //创建page对象
        try {
            int i = 10/0;
        } catch (Exception e) {
            //执行自定义异常
            throw new GuliException(20001, "执行了自定义异常处理......");
        }
        Page<EduTeacher> pageTeacher = new Page<>(current,limit);
        //调用方法实现分页
        teacherService.page(pageTeacher, null);
        long total = pageTeacher.getTotal();
        List<EduTeacher> records = pageTeacher.getRecords();


//        Map map = new HashMap();
//        map.put("total",total);
//        map.put("rows",records);
//        return R.ok().data(map);

        //也可以直接返回page方法
        return R.ok().data("total", total).data("rows", records);
    }

    //4 条件查询带分页的方法
    @ApiOperation(value = "条件分页查询讲师方法")
    @PostMapping("pageTeacherCondition/{current}/{limit}")
    public R pageTeacherCondition(@PathVariable Long current,
                                  @PathVariable Long limit,
                                  @RequestBody(required = false) TeacherQuery teacherQuery
                                  // 用@RequestBody不能@GetMapping(get没有请求体)
                                  // 要用@PostMapping,(required = false)表示可以为空
                                  ){
        //创建page对象
        Page<EduTeacher> pageTeacher = new Page<>(current, limit);

        //构建条件
        QueryWrapper<EduTeacher> wrapper = new QueryWrapper<>();

        //多条件组合查询

        String name = teacherQuery.getName();
        Integer level = teacherQuery.getLevel();
        String begin = teacherQuery.getBegin();
        String end = teacherQuery.getEnd();
        //判断条件值是否为空，如果不为空拼接条件   StringUtils 是Spring包下的
        //查不到可能数据库配置 url没有使用utf8
        if (!StringUtils.isEmpty(name)) {
            wrapper.like("name", name);
        }
        if (!StringUtils.isEmpty(level)) {
            wrapper.eq("level", level);
        }
        if (!StringUtils.isEmpty(begin)) {
            wrapper.gt("gmt_create", begin);
        }
        if (!StringUtils.isEmpty(end)) {
            wrapper.lt("gmt_create", end);
        }
        //排序
        wrapper.orderByDesc("gmt_create");
        //调用方法实现条件分页
        teacherService.page(pageTeacher, wrapper);
        long total = pageTeacher.getTotal();
        List<EduTeacher> records = pageTeacher.getRecords();
        return R.ok().data("total", total).data("rows", records);
    }

    //5 添加讲师接口的方法
    @ApiOperation(value = "添加讲师方法")
    @PostMapping("addTeacher")
    public R addTeacher(@RequestBody EduTeacher eduTeacher) {
        boolean save = teacherService.save(eduTeacher);
        // return save? R.ok() : R.error();
        if (save) {
            return R.ok();
        } else {
            return  R.error();
        }
    }

    //6 根据讲师id进行查询
    @GetMapping("getTeacher/{id}")
    @ApiOperation(value = "根据讲师id进行查询")
    public R getTeacher(@PathVariable String id) {
        EduTeacher eduTeacher = teacherService.getById(id);
        return R.ok().data("teacher", eduTeacher);
    }

    //7 讲师修改接口
    @PostMapping("updateTeacher")
    @ApiOperation(value = "修改讲师")
    public R updateTeacher(@RequestBody EduTeacher eduTeacher) {
        boolean flag = teacherService.updateById(eduTeacher);
        if (flag) {
            return R.ok();
        } else {
            return  R.error();
        }
    }
}

